Bob Morane

Bob and Bill are in Bolivia when they are suddenly attacked by the Yoronga Indians, who are considered peaceful. When they follow their attackers into the jungle, they come across a plantation set up by none other than their old acquaintance Staggart. He has succeeded in extracting a substance from a rare species of plant that can be used to render people will-less. With the help of this diabolical drug, which he has tried out on the Indians, he wants to manipulate the heads of state who are currently gathering in Vancouver for a summit meeting and seize world domination.